Improvements in card indexes,申请号GB19510023291-传众专利搜索

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发明名称	Improvements in card indexes
摘要
申请公布号	GB708848(A)	申请公布日期	1954.05.12
申请号	GB19510023291	申请日期	1951.10.05
申请人	PHILIPP VOGEL	发明人
分类号	B42F17/00	主分类号	B42F17/00
代理机构		代理人
主权项
地址

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